Caliper-register.



W. J. TAYLOR.

CALIPER REGISTER. APPLICATION FILED-APR. 7. 1915.

Patented Dec. 14, 1915.

Svvuamtoz WJ. Te wma JJ, $11M III,

Witmawaa -WALTEB. J. TAYLOR, or sAco, MONTANA.

CALIPER-REGISTER.

Specification of Letters Patent.

Patented Dec. ll ll,1915.

Application filed April 7, 1915. Serial No. 19,682.

To all whom it may concern:

Be it known that I, Wamnn J. TAYLOR, a citizen of the United States,residing at Saco, in the county of V alley and State of Montana, haveinvented certain new and useful Improvements in Caliper-Registers, ofwhich the following is a specification.

The present invention relates to certain new and useful improvements inthe construction of calipers, dividers and like instruments, and has forits object to provide a device of this character-which includes a novelform of registering device for indicating with accuracy the distancebetween the points. a V

Further objects of the invention are to provide a device of thischaracter which is comparatively simple and inexpensive in itsconstruction, which will not interfere in any manner with the use of thecalipers or other instrument in the usual manner, which will indicatewith accuracy the distance between the points of the instrument andthere by eliminate the necessity of using a separate scale in connectiontherewith, and which embodies a mechanical construction not liable toget out of adjustment or repair.

\Vith these and other objects in View, the invention consists in certainnovel combinations and arrangements of the parts as will more fullyappear as the description proceeds, the novel features thereof beingpointed out in the appendedclaims.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawing, in

' which For the purpose of illustration the invention is shown asembodied in calipers, although it will be understood that it can be usedwith equal advantage in connection with dividers and other similarinstruments.

Referring to the drawings, the numerals 1 and 2 designate the opposedlegs of the calipers, the free ends of the legs being curved outwardlyand then bent inwardly in the usual manner to provide the respectivepoints 1 and 2 which are employed in using the instrument. A leaf spring3 which has one end thereof secured to the leg 1 while the opposite endthereof engages the leg 2 normally tends to force the legs apart. Akeeper l is pivotally connected at 5 to the leg 2 and loosely receivesthe leg 1 between the arms thereof. An adjusting screw 4? is threaded inthe closed end of the keeper 4 and engages the leg 1 so that bymanipulating the adjusting screw the legs of the calipers can beaccurately set in the required manner.

Rigid with the leg 1 at the pivot end thereof is a dial plate b, theperiphery of the plate being provided with suitable graduations 7, whilethe central portion of the plate is formed with a large circulardepression 6, the base of the depression being provided at the centerthereof with a short upstanding boss 8 surrounding the pivot opening 9,and at the periphery thereof with an annular rack 10. Fitted within themouth of the depression 6 of the dial plate 6 is a second and somewhatsmaller dial plate 11 which is provided at the periphery thereof withgraduations 12 adapted to cooperate with the, graduations 7 of the dialplate 6 to indicate with accuracy the exact distance between the points1 and 2 of the legs of the calipers. The innerface of the dial plate 11is provided at the periphery thereof with an annular rack 13 similar tothe rack 10 of the dial plate (3 and having an opposed and spacedrelation thereto. The

central portion of the dial plate 11 is also provided with a short boss14: corresponding to the boss 8 of the dial plate 6.

Inter-posed between the dial plates (3 and 11 and arranged within thedepression 6 of the former is a disk 15 to which the leg 2 of thecalipers is rigidly connected, the said leg passing loosely through asuitable clear ance opening 16 orovided in one side of the depression(3. A pivot bolt 17 passes centrally through the two dial plates 6 and11 and the disk 15 so as to hold the members together and at the sametime admit of apiw otal movement thereof. The disk 15 is provided atsubstantially diametricallv opposite points with openings within whichsmall gear wheels 18 are mounted. said gear wheels being mounted uponradially disposed pins and projecting laterally from the faces of thedisk 15 so as to engage the racks l0 and 13 of the respective dialplates 6 and 11.

.lVith this construction, it will be obvious that when the legs of thecalipers are moved away from each other the dial plates will have arelative rotary movement which will be magnified or increased by theaction oi the small gear Wheels 18. When the points 1 and 2 of thecaliper legs are together,

' One set of the graduations may be arranged to act as a Vernier,thereby enabling great accuracy to be obtained in measuring and readingthedistance between the points of the calipers.

Having thus described the invention, what 1 claim as new and desire tosecure by Letters Patent, is

I. A' caliper or like instrument, including a pair ot'pivotallyconnected legs, a dial rigid with one of the legs, a concentric dialmounted upon the first mentioned dial, a plate rigid with the other leg,a single pivot member for the two dials and the plate, and an operativeconnection between the plate and the dials for rotating the dialsrelative to each other when the legs are swung apart, said dials beingprovided with cooperating graduations for indicating the distancebetween the free ends of the legs. v

2. A caliper or like instrument, including a pair of legs, a dial rigidwith oneol the legs, a second dial concentric with the first mentioneddial, said dials being provided upon adjacent faces with correspondingracks, a disk interposed between the dials and rigidwith the other leg,a pivot pin connecting the two dials and the disk, and a gear wheelcarried by the disk and engaging the corresponding racks of the twodials, so that the dials will be rotated relative to each other when thecaliper legs are swung apart, said dials'being provided with cooperatinggraduations for indicating the distance between the free ends of thelegs.

3. A caliper or'like instrument, including a pair of legs, a dial rigidwith one of the legs and formed with a central depression, the base ofthe depression being provided with an annular rack, a second dialarranged within the mouth of the depression of the first dial andprovided upon the inner face thereof with an annular rack having aspaced and opposed relation to the annular rack of the first mentioneddial, a disk interposed between the two plates and rigidly connected tothe opposite leg of the caliper,

legs and provided with a central depression and pivot opening, the baseof the depression being provided with a boss surrounding the pivotopening and an annular rack, a

second dial fitted within the mouth of the depression of the first dialand having a pivot opening, the inner face of the second dial-beingprovided with a b'oss surrounding the pivot opening and an annular rackhav- 7 ing a spaced and opposed relation to the annular rack ofthe firstdial, a disk interposed between the dials and held in a slightly spacedrelation to the two dials by the'before mentioned bosses a )ivot pin)assin through the pivot openingsof the two dials and the disk, saiddisk being rigid with the other leg or the caliper, and a gear wheelmounted upon the disk so as to project from opposite sides thereofandengage the annular racksot' the dials and'produce a rotary movementof the dials when the caliper legs are moved apart, the'before mentioneddials being provided with cooperating graduacaliper or like instrument,including 7 o a pair ,oflegs,-a dial rigid with one ot the tions forindicating the distance between the free ends of the caliper legs.

5. A caliper or'like'instrument, including a pair of pivotally connectedlegs, a 'dial rigid with-one of the legs, a concentric dial mounted uponthe'first mentioned dial, a platerigid with the other'leg, a-singlepivot member for the two dials and the plate, an operative connectionbetween the plate and the dials for rotating the fdials relative to eachother when the legs are swung apart, the said dials being provided withcooperating graduations for indicating the distance between thefree endsof the legs, a spring normally tending to swing the legs apart, a keepercarried by one of the legs, and an adjusting screw threaded withinthekeeper for engagement with the other leg for accurately setting thecalipers in the required manner.

In testimony whereof I afliX my signature in presence of two witnesses.v WVALTERJ. TAYLOR.

' Vitnesses: r 7 PAUL Enw. SKJERsETi-r, J OSEPH H. DYCHTOWICZ.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of. Patents,

' Washington, D. C.

